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| Brand | Samsung |
|---|---|
| Model | PM9A1 |
| Capacity | 1 TB |
| Usage Class | Client |
| Host Interface | PCIe Gen4 x4 |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | M.2 (2280) |
|---|
| NAND Flash | Samsung V-NAND 3D TLC |
|---|---|
| Drive Writes Per Day | 0.3 |
| Total Bytes Written | 600 TBW |
| Sequential Read | 7000 MB/s |
|---|---|
| Sequential Write | 5100 MB/s |
| Random Read IOPS | 1000000 |
| Random Write IOPS | 85000 |
| Average Latency | 80 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZVLB1T0HBLR-00000 |
|---|
Samsung PM9A1 1 TB (MPN: MZVL21T0HCLR) is the stronger step-up from MZVLB1T0HBLR-00000, moving to PCIe Gen4 x4 and delivering up to 7000/5100 MB/s with 1,000,000 random-read IOPS—roughly doubling host-interface bandwidth headroom over the previous PCIe Gen3 generation. For workstation boot drives, game asset streaming, and read-intensive edge compute nodes, its Samsung V-NAND 3D TLC plus 600 TBW endurance at 0.3 DWPD provides a better balance of top-tier client performance and sustained reliability than its predecessor.
With an endurance rating of 600 TBW, this 1TB SSD can sustain approximately 164 GB of writes per day for 10 years, which is more than sufficient for typical OS, office, and general application workloads. In practical terms, for use as a system or boot drive under normal business usage, this endurance level provides comfortable long-term write headroom. From a reliability perspective, the UBER rating of 1.0E-16 means the drive is designed for a very low rate of unrecoverable read errors, while the 1.5 million hour MTBF reflects a solid overall reliability baseline. This model does not include power-loss protection (PLP), so while it is well suited for standard client or workstation deployments, systems with frequent unexpected power interruptions or write-critical transactional workloads should use stable power or UPS protection.
1. The PCIe Gen4 x4 interface, paired with top-tier sequential read performance, accelerates VM boot storms, large database scans, and analytics dataset loading in bandwidth-hungry enterprise servers.
2. With up to 1,000,000K random-read IOPS, the drive can sustain extremely dense OLTP, metadata, and virtual desktop workloads while keeping application response consistently fast under heavy concurrency.
3. A 0.3 DWPD endurance profile makes it well suited for read-centric enterprise deployments such as content delivery, boot volumes, data lakes, and scale-out analytics tiers where capacity and speed matter more than intensive daily rewrites.
4. Samsung V-NAND 3D TLC provides a strong balance of flash density, cost efficiency, and stable enterprise performance, helping operators scale storage economically without giving up predictable service behavior.
5. A typical latency of 80 µs helps reduce storage-induced wait time for transactional applications, improving tail-response consistency in latency-sensitive cloud and database environments.
lower_capacity: 512 GB higher_capacity: 2 TB In this series, the 1 TB model sits at the sweet spot for mainstream enterprise deployment. Compared with the 512 GB version, it provides much better headroom for OS growth, application data, logs, and overprovisioning, reducing the risk of early capacity pressure. Compared with the 2 TB option, it keeps acquisition cost and fleet-wide budget under tighter control while still delivering essentially the same class of sequential and random performance. It is best suited for medium-scale rollout, such as boot and application storage for about 40–60 virtualized business workloads or edge servers.
Q: Is MZVL21T0HCLR suitable for a write-heavy database server?
A: Not ideal for write-heavy database workloads. With 0.3 DWPD, 600 TBW, and TLC NAND, it is better suited for read-intensive, mixed-use, or general-purpose server applications.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 0.3 DWPD, meaning about 0.3 full drive writes per day. For a 1 TB SSD, that equals roughly 300 GB of writes daily.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, it does not include PLP. This matters because PLP helps protect in-flight data and metadata during sudden power failure, which is especially important in enterprise or transactional environments.
Q: What RAID level is recommended for this SSD?
A: RAID 1 or RAID 10 is generally recommended for performance and redundancy. For capacity-focused deployments, RAID 5 may be considered, but write penalty should be evaluated carefully.